v6.1: RU-leak stoplist (65 forms / 648k tokens) + singles a/u removed

README.md

@@ -1,4 +1,4 @@
----
+---
 license: cc-by-4.0
 language:
 - ba
@@ -24,7 +24,7 @@ tags:
 - corpus-statistics
 ---
 
-# Bashkir Frequency Index v6.0
+# Bashkir Frequency Index v6.1
 
 Word-frequency index for the Bashkir language, built from **83.27 million
 tokens** of cleaned monolingual text (newspapers, magazines, encyclopedia,
@@ -35,11 +35,11 @@ by sentence-level filtering).
 
 | config | rows | cutoff | use case |
 |---|---:|---|---|
-| **`public`** (recommended) | 521,480 | count ≥ 3 | applications, spellcheckers, T9, research |
-| `full` | 1,290,160 | count ≥ 1 | morphology studies, OCR noise analysis |
+| **`public`** (recommended) | 521,415 | count ≥ 3 | applications, spellcheckers, T9, research |
+| `full` | 1,290,098 | count ≥ 1 | morphology studies, OCR noise analysis |
 
 Additionally: [`top_coverage_50.json`](top_coverage_50.json) — the minimal
-set of **1,624 word forms covering 50% of all tokens** (with cumulative
+set of **1,634 word forms covering 50% of all tokens** (with cumulative
 coverage), handy as a "learn these first" vocabulary list.
 
 ## Schema
@@ -67,10 +67,10 @@ coverage), handy as a "learn these first" vocabulary list.
 | tokens covered | forms needed |
 |---:|---:|
 | 25% | 188 |
-| 50% | 1,624 |
-| 80% | 17,361 |
-| 90% | 53,307 |
-| 95% | 130,399 |
+| 50% | 1,634 |
+| 80% | 17,559 |
+| 90% | 53,852 |
+| 95% | 131,559 |
 
 ## Method
 
@@ -83,6 +83,17 @@ coverage), handy as a "learn these first" vocabulary list.
   dropped except `ә / у / а`, 34,922 rare forms merged into their
   Damerau-Levenshtein-1 neighbours (conservative: ratio ≥ 50, length ≥ 5).
 
+
+## v6.1 changelog
+
+- Removed 65 Russian function-word forms that leak inside Bashkir sentences
+  (quotes, names): на, не, по, из, это... — 648,304 tokens. The list is
+  homograph-checked against Bashkir (kept: был = "this", ни = "what",
+  ти/тип = quotative, да/ла/лә/ҙа = "also" particle, без = "we").
+- Removed single-letter forms а, у (Russian-dominant usage); kept ә
+  (the Bashkir conjunction "and").
+- Baseline cleanups identical to v6.0 (glued forms, typo merge).
+
 ## Known caveats
 
 - The index is **wordform-level** (not lemmatized): agglutination produces
@@ -105,7 +116,7 @@ freq = load_dataset("failed09/bashkir-frequency-index", "public")["train"]
 
 ```bibtex
 @dataset{failed09_bashkir_frequency_index_2026,
-  title  = {Bashkir Frequency Index v6.0},
+  title  = {Bashkir Frequency Index v6.1},
   author = {failed09},
   year   = {2026},
   publisher = {Hugging Face},